code: def testRegression(self):
      size = 100
      nFrames = 10
      input = zeros([nFrames, size])
      for i in range(nFrames):
          for j in range(size):
              input[i][j] = random.rand() * 2.0 - 1.0
      self.evaluateSilenceRate(input)
  
file_path: essentia/test/src/unittests/standard/test_silencerate.py
imports: from essentia_test import *
  from essentia import *
  from numpy import random
label_desc: Use image node_id 2 for calling the TestSilenceRate obj's underlying member method code with example usage: obj.testRegression() without return types